Airline manuals. Pilot handbooks for BAC1-11, BAe-146, F-28, DC-8,9,10, L-1011, B-707,727,737,747, 757, 767, ops manuals, flight attendant manuals, fuel service manuals, weight & balance programs, training guides, MEL
/CDLs: from dozens of airlines, mostly extinct including PanAm, TWA and Braniff, as well as AFMs from the factory. Probably two thousand pounds of them.
Tumbleweeds. Mostly Russian thistle but some exotics too. Of course this collection is not static - they come and go all the time. Sometimes they pass thorugh in the middle of the night and I don't even get to catalog them.
Rum. I have what I deem to be a lifetime supply at the rate I drink. At least one bottle from every island in the Caribbean.
Happiness is not seeing another trite Ste. Maarten photo all week long.